WO2013140695A1 - 照明装置 - Google Patents

照明装置 Download PDF

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Publication number
WO2013140695A1
WO2013140695A1 PCT/JP2012/083680 JP2012083680W WO2013140695A1 WO 2013140695 A1 WO2013140695 A1 WO 2013140695A1 JP 2012083680 W JP2012083680 W JP 2012083680W WO 2013140695 A1 WO2013140695 A1 WO 2013140695A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
optical control
control film
opening
light sources
Prior art date
Application number
PCT/JP2012/083680
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
高橋　健
横田　昌広
修介 森田
修 小野
信雄 川村
大川　猛
英男 太田
松田　秀三
西村　孝司
Original Assignee
株式会社 東芝
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社 東芝 filed Critical 株式会社 東芝
Publication of WO2013140695A1 publication Critical patent/WO2013140695A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/14—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures with many small apertures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • F21V3/0625—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics the material diffusing light, e.g. translucent plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • Embodiment of this invention is related with the illuminating device which used the small light source and illumination cover like LED.
  • Glare is glare that is felt by lighting, and glare becomes stronger as “background brightness is lower”, “light source brightness is higher”, and “light source apparent area is larger”. On the other hand, not all of the brightness from the high-intensity light source becomes glare, and it may be used as one of lighting effects such as chandelier lighting.
  • the present invention has been made in view of the above points, and an object of the present invention is to provide an illumination device capable of producing a design-like shine and glitter while preventing unpleasant glare.
  • a lighting device includes a plurality of discretely arranged light sources, a cover that has light transmittance and covers the plurality of light sources, and a plurality of openings that are spaced apart. And an optical control film provided on the cover.
  • the plurality of openings and the plurality of light sources are arranged irregularly with respect to each other.
  • FIG. 1 is a cross-sectional view of a planar illumination device according to the first embodiment.
  • FIG. 2 is a plan view showing an arrangement of light sources of the planar illumination device.
  • FIG. 3 is a plan view showing an opening pattern of a transflective layer of the planar illumination device.
  • FIG. 4 is a diagram showing a luminance distribution when the cover is viewed from the front direction of the planar illumination device.
  • FIG. 5 is a graph showing the brightness of the light emitting part felt by a person when the size of the light emitting surface (horizontal axis) and the luminance (vertical axis) change.
  • FIG. 6 is a plan view of an optical control film showing various opening shape examples.
  • FIG. 7 is a cross-sectional view of the illumination device according to the second embodiment.
  • FIG. 8 is a diagram illustrating a luminance distribution when the cover is viewed from the front direction of the lighting apparatus according to the second embodiment.
  • FIG. 9 is a cross-sectional view of the illumination device according to the third embodiment.
  • FIG. 10 is a plan view showing an arrangement of light sources of the illumination device.
  • FIG. 11 is a plan view showing an opening pattern of a transflective layer of the illumination device.
  • FIG. 12 is a diagram illustrating a luminance distribution when the cover is viewed from an oblique direction of the lighting device.
  • FIG. 13 is sectional drawing of the illuminating device which concerns on 4th Embodiment.
  • FIG. 14A is a cross-sectional view of a lighting apparatus according to a fifth embodiment.
  • FIG. 14B is a longitudinal sectional view of the illumination device according to the fifth embodiment.
  • FIG. 1 is a cross-sectional view illustrating the planar illumination device according to the first embodiment.
  • the planar lighting device according to the first embodiment is a lighting device 10 in which a lighting fixture using a flat cover is provided with design characteristics of glitter and shine. That is, the lighting device 10 includes a substantially rectangular casing 2 having a bottom wall 2a and a side wall 2b erected along the periphery of the bottom wall, and a plurality of light sources 4 arranged on the bottom wall 2a of the casing. And a cover 5 covering the light source, and an optical control film 6 provided to face the surface of the cover 5.
  • the cover 5 is formed in a flat rectangular plate shape, and the outer peripheral portion thereof is fixed to the upper end of the side wall 2 b of the housing 2. As a result, the cover 5 closes the upper opening of the housing 2 and faces the cover 5 with a gap substantially parallel to the bottom wall 2a.
  • the cover 5 uses a transparent polymethyl methacrylate resin having light transmittance.
  • LEDs are used as the light sources 4, and the plurality of light sources 4 are discretely arranged on the rectangular substrate 3 at a distance from each other. And the board
  • the plurality of light sources 4 are arranged in a grid shape of 40 mm in a total of 5 rows and 8 columns in a grid pattern at intervals of 10 mm both vertically and horizontally.
  • the optical control film 6 has substantially the same size as the cover 5 and is provided over the entire inner surface of the cover 5.
  • the optical control film 6 is formed on the inner surface of the cover 5 and faces the light source 4.
  • the optical control film 6 has a large number of openings 7 arranged randomly.
  • random means, for example, that the horizontal and vertical coordinates of the opening 7 are defined by numerical values in a random number table in which the size of the cover 5 is the maximum number, so that an arbitrary number of openings 7 on the cover 5 It shows that they are arranged in a non-lattice form.
  • random means that the light source and the opening are in an irregular arrangement with each other, and the light source has a regular arrangement as in the embodiment, and the opening is a random arrangement using random numbers.
  • the openings 7 are randomly arranged at a density at which one opening 7 is arranged at 20 mm 2 on average, and the openings 7 are circular with a diameter of 0.8 mm.
  • the optical control film 6 is a semi-transmissive diffuse reflection film, and is formed on the inner surface of the cover 5 by printing.
  • the optical control film 6 excluding the opening 7 has a semi-transmission property that diffuses and transmits one normal-direction incident light beam by 70%.
  • the light beam that has passed through the optical control film 6 is diffused, and the light beam that has not passed through is again reflected inside the illumination device 1 and repeatedly enters the optical control film 6, and part of the light beam is diffusely transmitted. For this reason, the entire optical control film 6 emits light softly, and the opening 7 shines in a glittering manner according to the positional relationship with the plurality of light sources 4.
  • the shape or area of the opening 7 may be randomly changed in accordance with the randomness of the position, or the region where the opening 7 is provided over the entire area of the cover 5 may be locally limited.
  • the installation density of the openings 7 may be biased with respect to the entire area of the cover 5. These can be optimized in time according to the design of the lighting device 1.
  • the average separation distance of the openings 7 is less than 2 mm, that is, when the average density is one or less per 4 mm 2, it is difficult to distinguish the adjacent openings 7 from each other, and the arrangement of the plurality of light sources 4 is increased by increasing the density. Can be seen. For this reason, it is desirable to secure an average separation distance of the openings of 2 mm or more.
  • the opening part 7 of the optical control film 6 shines with the structure mentioned above.
  • the opening 7 a among the many openings 7 is in a straight line with the viewpoint A and the light source 4. Positioned side by side, the light source 4 is directly viewed through the opening 7a, and a strong light is felt.
  • the light source 4 does not exist on the straight line connecting the opening 7b and the viewpoint A, the opening 7b does not feel light.
  • FIG. 4 shows a luminance distribution when the cover 5 is viewed from the front direction.
  • the opening 7 is arranged over the entire cover 5, but the opening 7 can be arranged only in a partial region of the cover 5, and there is no problem in terms of function.
  • the brightness is determined by the size of the opening 7 and the luminance of the light source 4.
  • FIG. 5 is a graph showing the brightness of the light emitting part that a person feels when the size (horizontal axis) of the light emitting part (light emitting surface) and the luminance of the light emitting part (vertical axis) change.
  • the luminance of the light emitting unit is determined by the design of the lighting device, and the size of the opening 7 is adjusted based on the determined light source luminance. The standard of adjustment is shown, for example, in the literature (Lighting Research and Technology March, Vol. 32, 19-26 (2000)). It is more efficient to check the lighting.
  • luminance and lighting time of each luminescent spot can be changed by changing the magnitude
  • the shape of the opening 7 can be arbitrarily changed as long as it is within the above constraints.
  • FIG. 6 shows enlarged examples of various opening shapes of the opening 7. By combining an asymmetric shape as the shape of the opening 7, the brightness and lighting time of each bright spot can be changed depending on the direction of viewpoint movement.
  • the arrangement interval of the openings 7 is influenced by the arrangement interval of the light sources 4, but the blinking cycle of each light source accompanying the movement of the viewpoint becomes shorter as the arrangement interval becomes narrower. A blink that is too short can cause discomfort to the person. On the other hand, a lighting cycle that is too long makes it difficult to recognize blinking. Furthermore, if the aperture ratio becomes too high, there is a problem that the structure on the substrate 3 side can be directly visually recognized through the cover 5. Desirably, the arrangement interval of the openings 7 is designed so that the average blinking period of each bright spot is within a range of 0.1 to 1 second when the viewpoint is moved under an average observation condition. Specifically, this can be realized by setting the diameter of the opening 7 to 0.2 to 2.0 mm and the average distance of the opening 7 to 2 mm or more.
  • the arrangement of the openings 7 may be a regular arrangement, but in this case, an irregular blinking effect can be obtained by making the arrangement of the light sources 7 non-uniform.
  • the arrangement density of the openings 7 larger than the arrangement density of the light sources 4, the number of bright spots generated by one light source 4 is increased, and bright spots can be generated with a smaller number of light sources.
  • a transparent optical lens or microprism may be formed in the opening 7. For example, if it is a convex lens, it is possible to expand the light source range that can be viewed directly and increase the frequency and intensity of brightness to enhance the glittering feeling. It is possible to shine in a specific direction.
  • the optical structure can be formed by printing with transparent special ink or hot press molding.
  • the optical control film 6 is semi-transmissive, but this is to allow light to be transmitted and extracted even in a region other than the opening 7 in order to increase the efficiency of the illumination device.
  • the optical control film 6 can improve brightness uniformity other than the bright spot on the cover 5 by increasing the concealability. Further, by using a white pigment such as titanium oxide for the cover 5, an illumination device with high light utilization efficiency is obtained.
  • the optical control film 6 may be a high transmission scattering film made of scattering particles such as silica. In this case, the light use efficiency can be further increased. Even in this case, since the light passing through the optical control film 6 can reduce the straight light component by scattering, it is possible to obtain a shine feeling by the light transmitted through the opening 7.
  • the optical control film 6 may be a complete reflection film or a light absorption film, but the light use efficiency is greatly reduced, so that it is not suitable for a lighting device for obtaining illuminance.
  • the cover 5 is made of a transparent material, but the brightness ratio between the light that passes straight through the opening 7 and the light that passes straight through the optical control film 6 is within a range that satisfies the condition for obtaining a sense of brightness.
  • the cover 5 may have diffusibility.
  • the optical control film 6 is formed on the inner surface of the cover 5, but may be disposed on the outer surface of the cover 5. However, in this case, since there is a high possibility that the optical control film 6 directly touches a person or an object, it is desirable to increase the strength and resistance of the optical control film.
  • the optical control film 6 is directly formed on the surface of the cover 5, it may be separated from the cover 5, that is, provided with a gap from the surface of the cover 5.
  • a reflection sheet may be used as the optical control film 6 and an opening 7 formed in the plane may be disposed.
  • the arrangement of the light sources 2 is not limited to the lattice shape, and any discrete arrangement can be used because the same operation and effect as described above can be obtained.
  • the LED used as the light source 4 has a small light emitting area and is suitable as a point light source capable of obtaining a sense of brightness.
  • white LEDs are generally used as LEDs as light sources.
  • the entire cover 5 is white configured by mixing the emission colors of the respective light sources as illumination.
  • each flashing bright spot has a configuration in which a plurality of constituent colors flash irregularly, and an effect of changing the hue of the bright spot can be obtained.
  • FIG. 7 is a cross-sectional view illustrating the lighting device according to the second embodiment.
  • the cover 5 has a three-dimensional shape. That is, the illumination device 10 includes a bottom wall 2a that functions as the housing 2, a substrate 3 disposed on the bottom wall 2a, and a plurality of light sources 4 mounted on the substrate 3, and the cover 5 includes: It is fixed to the peripheral edge of the bottom wall 2 a and covers the light source 4. An optical control film 6 having a plurality of openings 7 is formed on the inner surface of the cover 5.
  • the optical control film 6 is disposed on the inner surface of the cover 5, and this can be created by forming the optical control film by an existing printing process and then molding the cover 5 by an existing thermoforming process. It is.
  • FIG. 8 shows a luminance distribution when the cover 5 is viewed from the front direction.
  • FIG. 9 is a cross-sectional view showing an illumination device according to the third embodiment.
  • the lighting device 10 is configured as a circular lighting device such as a household ceiling light.
  • the plurality of light sources 4 are arranged circumferentially on the annular substrate 3.
  • a cover 5 covering the light source 4 is formed in a disc shape or an annular shape, and an optical control film 6 is provided on the inner surface of the cover 5.
  • the plurality of openings 7 of the optical control film 6 are randomly arranged according to the arrangement of the light sources 4.
  • the lighting device can be given a brilliant way of changing the shining position in accordance with the movement of the viewpoint by the same effect as the first embodiment described above.
  • FIG. 12 shows a luminance distribution when the cover 5 is viewed from the illumination device 10 from an oblique direction.
  • FIG. 13 is sectional drawing which shows the illuminating device which concerns on 4th Embodiment.
  • the present embodiment is an example in which the lighting device is applied to a lighting device such as an LED bulb.
  • the illuminating device 10 includes a base material 11 having a front surface portion, a base 12 attached to a lower end portion of the base material, a plurality of light sources 4 provided on the front surface portion of the base material, A substantially spherical cover 5 that covers the light source 4 and is attached to the base material, and an optical control film 6 that is provided on the inner surface of the cover and has a plurality of openings 7 are provided.
  • the plurality of light sources 4 are discretely arranged on the front surface portion of the substrate 11.
  • the cover 5 After the cover 5 is printed with the optical control film 6 having the opening 7 on the substrate, the cover 5 having a desired shape including the optical control film 6 is formed by molding the substrate by thermoforming such as blower molding. be able to. Even in such a configuration, the effect described in the first embodiment can provide an illuminating device that shines in a sparkling manner in which the shining position changes corresponding to the movement of the viewpoint.
  • FIG. 14A is a cross-sectional view of the lighting device according to the fifth embodiment
  • FIG. 14B is a vertical cross-sectional view of the lighting device.
  • This embodiment is an example applied to a tube type illumination device such as an LED fluorescent lamp.
  • the lighting device 10 includes a base material 11 having a front surface portion, a plurality of light sources 4 provided on the front surface portion of the base material, and substantially attached to the base material so as to cover the light sources 4.
  • a cover 5 and an optical control film 6 provided on the inner surface of the cover and having a plurality of openings 7 are provided.
  • the base material 11 has, for example, a semicircular cross section and is elongated and extends linearly or in a circle.
  • the plurality of light sources 4 are arranged linearly or in a circle on the front surface of the substrate 11 and discretely arranged.
  • the cover 5 is formed in an elongated cylindrical shape having a semicircular cross section. The cover 5 is attached to the front surface portion of the base material 11 and covers the light source 4.
  • the substrate 5 is formed by thermoforming such as vacuum forming, so that the cover 5 having the required shape including the optical control film 6 is created.
  • the light sources 4 are discretely arranged on the front surface portion of the base material 11 made of, for example, metal, as shown in FIG. 14A, a plurality of light sources are not arranged in the cross-sectional direction of the tube. However, by arranging a plurality of openings 7 in the circumferential direction of the cover 5, a bright spot blinking effect can be obtained.
  • FIG. 14B with respect to the tube length direction, a plurality of light sources 4 are arranged, and due to the effect described in the first embodiment, the lighting device has a glittering way of changing the shining position corresponding to the movement of the viewpoint. Can be given.
  • the lighting devices according to the second to fifth embodiments described above have a simple structure, can be applied to various lighting devices, and can provide the effect of irregularly blinking bright spots.
  • the brightness of each bright spot greatly varies with the movement of the viewpoint, so that it is possible to obtain an illumination effect that repeatedly blinks irregularly, and a decorative effect that is more easily recognized by the human eye.
  • or 5th embodiment mentioned above similarly to 1st Embodiment, obtaining the illuminating device which can produce the brightness and glittering feeling with a design property, preventing an unpleasant glare. Can do.
  • the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage.
  • various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.
  • constituent elements over different embodiments may be appropriately combined.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
PCT/JP2012/083680 2012-03-23 2012-12-26 照明装置 WO2013140695A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-068410 2012-03-23
JP2012068410A JP5531302B2 (ja) 2012-03-23 2012-03-23 照明装置

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190041035A1 (en) * 2016-02-26 2019-02-07 Philips Lighting Holding B.V. Lighting device with sparkling effect
EP3426974B1 (en) * 2016-03-11 2021-02-17 Signify Holding B.V. Lighting device with sparkling effect

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9714744B2 (en) * 2013-02-25 2017-07-25 Philips Lighting Holding B.V. Lighting device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01140502A (ja) * 1987-11-26 1989-06-01 Matsushita Electric Works Ltd 照明カバー
JP2002100222A (ja) * 2000-09-26 2002-04-05 Matsushita Electric Works Ltd 照明器具
JP2007042511A (ja) * 2005-08-04 2007-02-15 Sharp Corp 面光源装置及びそれを備えた表示装置
JP2011502273A (ja) * 2007-10-12 2011-01-20 ブライト ビュー テクノロジーズ インコーポレイテッド 光マネジメントフィルム、バックライトユニット、及び関連構造体
JP2011204676A (ja) * 2010-03-03 2011-10-13 Toshiba Corp 照明装置およびこれを備えた液晶表示装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7915627B2 (en) * 2007-10-17 2011-03-29 Intematix Corporation Light emitting device with phosphor wavelength conversion
JP2013011667A (ja) * 2011-06-28 2013-01-17 Dainippon Printing Co Ltd 光学シート、面光源装置、及び画像表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01140502A (ja) * 1987-11-26 1989-06-01 Matsushita Electric Works Ltd 照明カバー
JP2002100222A (ja) * 2000-09-26 2002-04-05 Matsushita Electric Works Ltd 照明器具
JP2007042511A (ja) * 2005-08-04 2007-02-15 Sharp Corp 面光源装置及びそれを備えた表示装置
JP2011502273A (ja) * 2007-10-12 2011-01-20 ブライト ビュー テクノロジーズ インコーポレイテッド 光マネジメントフィルム、バックライトユニット、及び関連構造体
JP2011204676A (ja) * 2010-03-03 2011-10-13 Toshiba Corp 照明装置およびこれを備えた液晶表示装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190041035A1 (en) * 2016-02-26 2019-02-07 Philips Lighting Holding B.V. Lighting device with sparkling effect
EP3426974B1 (en) * 2016-03-11 2021-02-17 Signify Holding B.V. Lighting device with sparkling effect
US10976026B2 (en) 2016-03-11 2021-04-13 Signify Holding B.V. Lighting device with sparkling effect

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JP2013201017A (ja) 2013-10-03

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